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Operation of the EQ

/50/52 Chapter 5

5.3 VRM expansion

This feature will provide an expanded view of the area near the

Variable Range Marker which will give a better separation of echoes.

The actual size of the expansion window can be adjusted in the Setup

display for 38kHz/50kHz/200kHz. As an example, from active echo

display, 50kHz:

Press [MENU], to call up the menu bar, and…

3,5

press

[3]

and

[5]

to activate VRM expansion of the 50kHz sounder

or…

ZOOM

gain direct access to the VRM expansion feature by pressing

[ZOOM]

The zoom level can be selected in seven steps ranging from 3 to 50

meters, or converting to feet or fathoms (refer to Setup for units,

section 7.1). The VRM horizontal line can be moved up/down by

means of the cursor.

+/-

Adjust range with the + and - keys

ENT

Open Setup display (see section 5.8), if any changes are required

ENT

and confirm changes with

[ENT]

ZOOM

Turn VRM expansion off again

T *.*°C S 0.0kn DK 5.0 m

FREQUENCY: 50kHz

PULSE: A- SHORT

POWER: A- 1000W

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